Alright, let's solve this math problem step by step. First, we have the number 161. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 72. So, we're going to take the number 161 and add it to itself 72 times.
Step 1: 0 + 161 = 161
Step 2: 161 + 161 = 322
Step 3: 322 + 161 = 483
Step 4: 483 + 161 = 644
Step 5: 644 + 161 = 805
Step 6: 805 + 161 = 966
Step 7: 966 + 161 = 1127
Step 8: 1127 + 161 = 1288
Step 9: 1288 + 161 = 1449
Step 10: 1449 + 161 = 1610
Step 11: 1610 + 161 = 1771
Step 12: 1771 + 161 = 1932
Step 13: 1932 + 161 = 2093
Step 14: 2093 + 161 = 2254
Step 15: 2254 + 161 = 2415
Step 16: 2415 + 161 = 2576
Step 17: 2576 + 161 = 2737
Step 18: 2737 + 161 = 2898
Step 19: 2898 + 161 = 3059
Step 20: 3059 + 161 = 3220
Step 21: 3220 + 161 = 3381
Step 22: 3381 + 161 = 3542
Step 23: 3542 + 161 = 3703
Step 24: 3703 + 161 = 3864
Step 25: 3864 + 161 = 4025
Step 26: 4025 + 161 = 4186
Step 27: 4186 + 161 = 4347
Step 28: 4347 + 161 = 4508
Step 29: 4508 + 161 = 4669
Step 30: 4669 + 161 = 4830
Step 31: 4830 + 161 = 4991
Step 32: 4991 + 161 = 5152
Step 33: 5152 + 161 = 5313
Step 34: 5313 + 161 = 5474
Step 35: 5474 + 161 = 5635
Step 36: 5635 + 161 = 5796
Step 37: 5796 + 161 = 5957
Step 38: 5957 + 161 = 6118
Step 39: 6118 + 161 = 6279
Step 40: 6279 + 161 = 6440
Step 41: 6440 + 161 = 6601
Step 42: 6601 + 161 = 6762
Step 43: 6762 + 161 = 6923
Step 44: 6923 + 161 = 7084
Step 45: 7084 + 161 = 7245
Step 46: 7245 + 161 = 7406
Step 47: 7406 + 161 = 7567
Step 48: 7567 + 161 = 7728
Step 49: 7728 + 161 = 7889
Step 50: 7889 + 161 = 8050
Step 51: 8050 + 161 = 8211
Step 52: 8211 + 161 = 8372
Step 53: 8372 + 161 = 8533
Step 54: 8533 + 161 = 8694
Step 55: 8694 + 161 = 8855
Step 56: 8855 + 161 = 9016
Step 57: 9016 + 161 = 9177
Step 58: 9177 + 161 = 9338
Step 59: 9338 + 161 = 9499
Step 60: 9499 + 161 = 9660
Step 61: 9660 + 161 = 9821
Step 62: 9821 + 161 = 9982
Step 63: 9982 + 161 = 10143
Step 64: 10143 + 161 = 10304
Step 65: 10304 + 161 = 10465
Step 66: 10465 + 161 = 10626
Step 67: 10626 + 161 = 10787
Step 68: 10787 + 161 = 10948
Step 69: 10948 + 161 = 11109
Step 70: 11109 + 161 = 11270
Step 71: 11270 + 161 = 11431
Step 72: 11431 + 161 = 11592

So, 161*72 = 11592